Vessel isolating retractor cannula and method
CA 2274270 A1 · Owner: Lunsford, John P. · Inventors: Lunsford, John P.; Chin, Albert K.; Baxter, Jeffrey W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A retractor and a surgical tool are positioned within a cannula. and a dissection, cradle of the retractor is positioned at the distal end of the cannula. The retractor includes, a first portion with an axis approximately parallel to the axis of the cannula and a second, portion with an axis at an angle to the axis of the cannula. The dissection cradle is, located at the distal end of the second portion of the retractor and may , include two, substantially parallel spaced legs with the retractor shaped in a loop between and in a, plane skewed relative to the axis of the legs and with the loop directed away , from the surgical tool. Thus, in operation, when the surgeon locates a vein …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed June 8, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 8, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 8, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.